Two-needle type sewing machine

Sewing – Stitch forming – Multiple needle

Patent

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Details

112300, D05B 108, D05B 6500

Patent

active

056032722

ABSTRACT:
A two-needle sewing machine includes first and second sewing needles for performing two stitching operations at the same time; a motor for driving the first and second sewing needles; first and second thread cutting mechanisms provided for the first and second sewing needles, respectively, for cutting threads at the ends of the stitching operations; a first actuator and a second actuator for driving respective ones of the first and second thread cutting mechanisms; and a thread cutting control circuit which stores data corresponding to the timing of a first thread cutting drive signal to the first actuator and the timing of a second thread cutting drive signal to the second actuator, both signals corresponding to rotational speeds of the motor, and which, according to the data and the rotational speeds of the motor, applies the first and second thread cutting drive signals to the first and second actuators at different times defined by the data.

REFERENCES:
patent: 3582663 (1971-06-01), Troast, Jr.
patent: 4421045 (1983-12-01), Portilla

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